Answer to Question #319007 in General Chemistry for Kev

Question

1. Which of the following defines Hess's Law?

A. Difference of enthalpy changes for the individual steps that make up the overall reaction.

B. Product of enthalpy changes for the individual steps that make up the overall reaction.

C. Sum of enthalpy changes for the individual steps that make up the overall reaction.

D. Sum of standard enthalpy for the individual steps that make up the overall reaction.

2. Flip equations around if necessary to cancel out terms on opposite sides. This is the__step in calculating the enthalpy changes based on the discussion.

A. First

B. Second

C. Third

D. Fourth

3-7. Sequence the given steps in solving for the enthalpy of combustion by writing the number in your notebook. (1-1st step to 5-5th step).

_flip equations around if necessary to cancel out terms on opposite side.

_sum up the individual steps.

_balance the individual equation.

_if necessary, look up standard enthalpies.

_changing the equation around requires a sign change of the H of that individual step.

Answer 1

D